Security Tools/Password Strength Checker
Password Strength Checker
Analyze password strength and get improvement suggestions
Check Password Strength
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Password Strength Checker Guide
Learn how to evaluate password security
What is a Password Strength Checker?
A password strength checker analyzes your password and evaluates its security level based on length, complexity, and common patterns. It helps identify weak passwords that could be easily guessed or cracked by attackers.
How to Use This Tool
- Enter or paste your password in the input field
- View the strength meter and score instantly
- Check detailed feedback on what makes it strong or weak
- Follow suggestions to improve your password
Strength Criteria
- Length: Longer passwords are exponentially harder to crack
- Variety: Mix uppercase, lowercase, numbers, and symbols
- Uniqueness: Avoid common words, patterns, and personal info
Security Note
Your password is analyzed entirely in your browser. It is never sent to any server or stored anywhere, ensuring complete privacy during the check.
Frequently Asked Questions
How does a password strength checker work?
Password strength checkers analyze multiple factors: length (longer = stronger), character variety (uppercase, lowercase, numbers, symbols), pattern detection (dictionary words, sequences, repeated characters), and comparison against known breached passwords. Each factor contributes to an overall strength score.
Is my password sent to a server when checking?
No, this tool analyzes passwords entirely in your browser using JavaScript. Your password never leaves your device and isn't transmitted over the network. This ensures complete privacy - you can verify by checking network requests in browser developer tools.
Why is my password marked weak even though it seems complex?
Common patterns like 'Password123!' appear complex but are well-known to attackers and appear in breach databases. Similarly, keyboard patterns (qwerty), dates (birthdays), and substitutions (p@ssw0rd) are easily guessed. True strength comes from randomness and length, not apparent complexity.
What makes a password truly strong?
Strong passwords are: 1) At least 16+ characters long, 2) Randomly generated or using unrelated words (passphrase), 3) Unique to each account, 4) Not based on personal information. Consider using a password manager to generate and store truly random passwords.
Should I use a password strength checker before setting passwords?
Yes, but only client-side checkers like this one that don't transmit your password. Better yet, use a password manager's generator which creates passwords that are guaranteed strong. Never enter real passwords into online checkers that might log or transmit them.